Thermography Case Study: Identifying Critical Hotspots Through Infrared Inspection in VFD panels of bus bars
Introduction
Welcome to our case study on thermal imaging technology. In the realm of electrical system maintenance, thermal imaging stands out as a highly effective, non-contact inspection method. This technique allows for swift evaluations of equipment while it remains operational. By comparing the thermal signatures of equipment under normal conditions with those of equipment showing potential issues, thermal imaging provides a powerful tool for diagnosing and troubleshooting problems efficiently. Explore how this advanced approach can enhance the reliability and safety of electrical systems.
Case Description
In MAY 2024, during the electrical thermography Inspection, infrared detected catastrophic heat at VFD panels of bus bars due to bad connections. The bus bar bolt experienced high temperatures due to excessive heat.
Recommended Action
- Remove the bolts and busbar, then inspect and clean the connections
- Retighten the bolts and reinsert the busbar to ensure proper temperature regulation. If the temperature remains elevated, replace the bolts and busbar
- Ensure that all three busbars are of the same size and type, and sourced from the same manufacturer
- Inspect for loose or overtightened bolts
- Inspect the physical condition of the bolts and busbar, including their threads
- Perform the necessary repairs and re-tighten the connections
- Re-verify the temperature with a thermography survey to assess the equipment's condition
Action Taken
The site's electrical maintenance team promptly planned and executed necessary maintenance work. As a result of the corrective measures, Sp1 values saw a significant drop from 748°C to 20.1°C
Read More:
What is Infrared Thermography for Electrical Inspection?
Conclusion
By identifying the fault ahead of time, we were able to plan effectively and order the necessary materials and tools in advance. This not only helped us prevent a major fire hazard and unexpected operational stoppage but also resulted in a significant reduction in the labour hours required to replace the faulty components.
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